Combination boiler tool



Dec. 19, 1922. 1,439,568;. G. R. MAuPm.

COMBINATIGN BUILER TOOLI FILED AUGJG, 1920. 3 SHEETS-SHEET 1.

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3a 36 26 35 v E5 y? f5 Dec. y19, 1922. v 1,439,568. j

G. R. MAUPINV. COMBNATION BOlLER TOOL.

FILED AUG. Uitl 1920. 3 SHEETS-SHEET 2- 8 Hf? 37 jg Patented lDec. 19, 1922.

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FAESSLER, AND GRAVES R- MAUPINQ,

COMBINATIONBOILERIOOL.

To all wiz/m t may concer/n.' v

Be it known that I7 GRAVES It. MAUPIN, a citizen of the United States,V and a resident of Moberly, Missouri, have inventedcertain new and useful Improvements in Combination Boiler Tools, of which the following is a specification containing a full, 'clear1 and exact description, reference being had to the accompanying drawings, forming a part hereof.

My invention relates to improvements in combination boiler tools and has for its primary object a tool which performs the two-fold function of first making a seat in the hand-hole of the water leg of a boiler.` and then seating the hand-hole cap therein.

A further object is to construct a .com bination boilertool'using rollers to forni the seat of a hand hole and seat the cap` with a mandrel havinga removable expander tip so that the same tool maybe used for both purposes without any change7 except the tip.

In the drawings: Figure 1 is a side elevation of my tool in position showing it forming the seat for vthe hand-hole cap.

Fig. 2 is a similar view showing the d'evice employed in seating the cap.

of the mandrel and tip showing the manner of securing the same together, andl also the f means for preventing the locking pinl fromdropping'. out `of the shole.

yFig. 3 is a longitudinal section of the dek26 is being: secured within the cage.

is abottom* plan viewof the roll.

S.Fig. 10 is a cross-sectional view taken on the-.line 10-10 of Fig. 3.

Fig. 11 isa longitudinal sectional view of ny device asapplied toa power-driven too f F ig. 12 isa cross-sectional view on the 1in@ i2 i2 of Fig. 11.

In the construction of my device I employ a cage 13. This cage is provided with openings l--through which project tapered rollers 15. These tapered rollers are designed to come in, contact with the edge of a hand-hole and besides making a smooth, burnished surface also taper it, as indicated by numeral 16. The cage 13 is provided at .itsfrear end with aflange 17, against one faceA of which rests, a boring ring 18, and against thisring 18 rests the collar 19. The collar19 is loosely mounted on the cage and is provided with a circular recess-20. This recess is adapted to receive the ends of pins 2195 which pins are inserted through openings 22 formed in the cage. The purpose of this groove or recess and pins is to prevent the collar .from becoming detached. The 'collar has one yof itsflat faces recessed as at 23. This-is to allow the collar to project slightly over the rolls 15. rThe front edge of the cage is provided with a )curvedsurface 24 ,rin which notches 25 are cut. -The purpose of these notches is to holdy the cagezwhile the sleeve orstud This sleeve is provided with screw threads which are designed to `coact with the screw threads 27 formed in the cage. The cage is provided witn an enlarged internal recess 285 which permits the insertion of the rfoll retainer 29:l This roll retainer is provided with legs 30, the spaces between these legs being less-than the diameter of the rolls to prevent-the same from droppingv into the cage'when the mandrelk andl its tiphave been removed. The roll retainer 29 is provided with an enlarged portion 31, which Lrestsagainst a shoulder 32l formed in the cage,- and is securely clamped between the shoulder 32'and 'the sleeve'f`26. After ythe-1; sleevey has'bee'n secured inthe cage,

the .lock nut 33 is screwed tight against the face 34 of the cage. This prevents the removal of the sleeve accidentally. The sleeve 26 is also provided with a longitudinal groove ory grooves The purpose of this is to lock the depth gagek 36in position on the sleeve. thev set-.screw 37 which is screwed through the depth gage and enters the slot, thus preventing the turning of the gage'. and, consequently, its movement on the sleeve. Over the sleeve 26 and to the rear of the gage 36 is secured a screw-threaded feeding; sleeve 38. This sleeve is provided at its rear end with the. opening 319, through which the mandrel 40 passes. The opening 39 is, however, smaller in diameter than the screw-threaded interior ofV the feeding sleeve, thus forming the'shoulder 411 against which the collar 42 of thel mandrel" rests. The sleeve 26 is also provided with apair of openings 43. These openings being. to permit the insertion of a har whenV securing the sleeve in the cage. Themandrel 40 is cylindrical in .forni and yis provided on its rear end with a square projection 43a, which is for the purpose of allowing a wrench to be used. Adjacent the portion 431a are formed openings 44, which extend entirelyV through the mandrel and permit the insertion of a bar for operating the device; To the rear of the collar 42V is located a collar 45. This collar is secured .tol the mandrel by means of the tapered pin 46. This prevents any lateral movement of the mandrel with-` in the feeding sleeve 38.v The face of' the collar 45, which aloutsy the feeding sleeve 38 is provided with a bore k47V in which is seated a spring actuated lug 48, and inthe outer surface of the collar 45' is formed a slot 49. This slot allowing the handle 5.0,

which is attached to the lng to be' moved sideways and hold; the lug in retarded. or withdrawn position; Communicating with the slot 49 is a slot 51. This will permit the forward movementl of the lug when the handle 5() is'brought into. vertical: position, and the forward pressure of thespring 52 will force the lugV into. the recess 53 cut in the feeding sleeve. Thisfwillcause the sleeve- 38 to turn with the mandrel and force the mandrel forward'. The `opposite end of the mandrel 401s provided .with a square projection 54, and through thisipro# jection is a cylindrical bore 55. ghetsqifrare' projection 54 is designed to enterthe recess 56 of thev mandrel tip. y5.7. This mandrel tip is'cylindri-calvfor Vparted its length adjacent the recessed enchthe rbalance being tapered as indicated by the numeral.;58.

Formed in the cylindrical particu. of .the 1 mandrel tip 57 is a4 cylindrical v opening'. 59.

This cylindrical opening. registering with' the open-ing'y 55 is forhefvpurposafofrecleiving the locking pinugby". meansgo This isl done by means ofv which the mandrel and tip are secured together. In the cylindrical surface is also formed a groove 61, which is for the puri pose of receiving a splitl spring ring 62, this ring preventing the accidental removal of the locking pin 50 when the mandrel is withdrawn. y

It will be noted from Figs. 3 and 4 that the mandrel tips are slightly different in shape, .the taper on the tip shown in Fig. 4 loeing longer than that shown in Fig. 3, the tip with the short taper being the tip for'forming the seat while the tip shown in Fig. 4 is used for seating the cover.

Referring to Fig. l1 the screw-tlneadcd recess 27 of the cage is provided with an undercut circular recess 63, the purpose of which is to receive a split ring 64. This split ring serves the twofold purpose of preventing the roll retainer from becoming dislodged as well as to prevent the collar retaining pins from dropping out. In this construction'l employ a mandrel 65, which has its one end tapered so as to fit within the spindlev or chuck of a drill press or simila` tool. Adjacent this taper is a collar 66 which bears against the kfree end of a screw threaded sleeve 67. This screw-threaded sleeveis adapted to be secured in the head at a predetermined distance and then locked in position therein by means of a loclcnut 68. In order to easily secure adjustment the end' 69 of the sleeve is made rpreferably ywith a wrench engaging surface, and it is against this end of the sleeve that the collar 66 abuts, this limits the movement.

The. operation of my device is as follows:

Vhen it is desired to use the tool on new work, that is, where the hand-hole cap, as shown in Fig. 2, has not been used, the mandrel] tip 57 is secured on the mandrel. This is done by removing the sleeve 38 from the sleeve 26. The tip 57 is then placed over the projection 54, the pin 60 inserted through the bores 59 and 55 and the spring ring 62 placed irl-position in the groove 6l, the mandrelis then inserted through the sleeve 26, the depth 'gage 36 adjusted and secured in position and the mandrel rotated. Before rotating the mandrel, the sleeve 38 is screwed up suiciently tight. to.` vbring the rolls 15 to bearagainstthe edge of the hand-hole. The lug., or .dog 48 is then released and allowed to enterV theyrecess `53, 'the mandrel isnow rotated, this rotation turning also the sleeve 38, forcing the mandrelforward in the cage and expanding the rollers. TWhen sufficient amount `of pressure has been brought to bear on the rollers, the lug 4:8 is withdrawn and the mandrel continued to revolve until it again becomes loose in the hole, the dog is thenl again allowed to enter the recess 53 and the feeding forward continued until such time as the sleeve 38 comes in contact with the depth gage 36. This assures uniform sizes of all the hand-holes. The mandrel 40 and tip 57 together with sleeve 38 are now removed andthe seating tip 73 secured on the mandrel. This tip, due to its longer taper, will allow the rollers to come closer together. This is necessary so that the rollers may enter the interior of the hand-hole cap h(4hthis is shown in Fig. 2. The device is then again rotated and fed forward until the cap is seated within the hand-hole. This operation of seating the cap is, however, not an expanding operation, as the cap is' previously tapped into the hole and this rolling only serves to make a tight metal-to-metal contact between the cap and the hole by smoothing out any irregularities in the cap. The pressure set up on the inside of the water leg when the boiler is in operation is sufficient to hold the cap against dislodgment, but, at the same time, the cap can be readily driven inward when it is desired to remove it for getting at the boiler tubes.

Having fully described my invention what I claim is:

1. A combination boiler tool comprising a cage, rollers mounted in said cage, a screw threaded sleeve secured in said cage, a mandrel having a detachable tip loca-ted in said sleeve, a depth gage adjustably carried by said screw threaded sleeve, a feeder sleeve for feeding said mandrel forward and backward, and means carried by the-mandrel and drel having a detachable tapered tip carried by vsaid feeder sleeve, a collar revolubly secured on said cage, and means for rotating said feeder sleeve simultaneously with the mandrel.

8. A combination boiler tool comprising a a screw-threaded sleeve secured in said cage, a lock-nut for locking said screw-threaded sleeve and cage together, a feeder sleevev secured on the screw-threaded sleeve, a mandrel carried by said feeder sleeve, a tapered tip detachably secured to said mandrel, and a lug carried by the mandrel for revolving the feeder sleeve simultaneously therewith.

4. A combination boiler tool comprising a cage, expansion rollers mounted in said cage, a roll retainer mounted in the cage, a screwthreaded sleeve mounted in the cage, a depth gage carried by the screw-threaded sleeve, a feeder sleeve secured on the serew-threaded sleeve and adapted to contact with the depth gage, a mandrel secured in the, feeder sleeve, a tapered tip detachably secured to the-mandrel, means fory securing said tip to the mandrel, and spring-actuated lug carried by the mandrel, said lug adapted to cause the feeder sleeve and mandrel to revolve simultaneously and feed the mandrel forward or backward.

In testimony whereof, I have signed my name to this specification.

GRAVES R. MAUPIN.

cage, expander rolls mounted in said cage, 

